Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1)
Abstract
Neodymium (Nd) isotopic composition (εNd) is an important tracer for water mass mixing and the reconstruction of past ocean circulation. To allow for a direct model-data comparison, we have implemented Nd isotopes in the ocean component of the Community Earth System Model (CESM1.3). The model is able to capture the major features of the observed modern distribution of both εNd and Nd concentrations. Our model provides a useful tool for the interpretation of εNd reconstructions. For example, we show that in an idealized North Atlantic freshwater hosing experiment, εNd changes in the Atlantic are documenting primarily the changes in water mass mixing and are hardly affected by the concomitant and large changes in the marine biological productivity and organic matter fluxes. However, the hosing experiment also shows that the end-member changes due to the change of ocean circulation can influence the interpretation of εNd in the Atlantic, depending on the location. The implementation of Nd, together with other existing tracers, such as δ18O, 231Pa/230Th, δ13C, and radiocarbon in the same model, can improve our understanding of past ocean circulation significantly.
- Authors:
-
[1];
[3];
[5];
[4]
- Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison WI USA, Now at Physical Oceanography Laboratory, Ocean University of China, Qingdao China
- Atmospheric Science Program, Department of Geography, The Ohio State University, Columbus OH USA
- Department for Atmospheric and Oceanic Sciences and Institute of Arctic and Alpine Research, University of Colorado Boulder, Boulder CO USA
- Climate and Environmental Physics, Physics Institute and Oeschger Center for Climate Change Research, University of Bern, Bern Switzerland
- Computational Physics and Methods (CCS-2) and Center for Nonlinear Studies (CNLS), Los Alamos National Laboratory, Los Alamos NM USA
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Laboratory Directed Research and Development (LDRD) Program
- OSTI Identifier:
- 1497749
- Alternate Identifier(s):
- OSTI ID: 1497750; OSTI ID: 1499368
- Report Number(s):
- LA-UR-19-21453
Journal ID: ISSN 1942-2466
- Grant/Contract Number:
- SC0006744; 89233218CNA000001
- Resource Type:
- Published Article
- Journal Name:
- Journal of Advances in Modeling Earth Systems
- Additional Journal Information:
- Journal Name: Journal of Advances in Modeling Earth Systems; Journal ID: ISSN 1942-2466
- Publisher:
- American Geophysical Union (AGU)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Nd isotopes; isotope modelling; CESM
Citation Formats
Gu, Sifan, Liu, Zhengyu, Jahn, Alexandra, Rempfer, Johannes, Zhang, Jiaxu, and Joos, Fortunat. Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1). United States: N. p., 2019.
Web. doi:10.1029/2018MS001538.
Gu, Sifan, Liu, Zhengyu, Jahn, Alexandra, Rempfer, Johannes, Zhang, Jiaxu, & Joos, Fortunat. Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1). United States. https://doi.org/10.1029/2018MS001538
Gu, Sifan, Liu, Zhengyu, Jahn, Alexandra, Rempfer, Johannes, Zhang, Jiaxu, and Joos, Fortunat. Mon .
"Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1)". United States. https://doi.org/10.1029/2018MS001538.
@article{osti_1497749,
title = {Modeling Neodymium Isotopes in the Ocean Component of the Community Earth System Model (CESM1)},
author = {Gu, Sifan and Liu, Zhengyu and Jahn, Alexandra and Rempfer, Johannes and Zhang, Jiaxu and Joos, Fortunat},
abstractNote = {Neodymium (Nd) isotopic composition (εNd) is an important tracer for water mass mixing and the reconstruction of past ocean circulation. To allow for a direct model-data comparison, we have implemented Nd isotopes in the ocean component of the Community Earth System Model (CESM1.3). The model is able to capture the major features of the observed modern distribution of both εNd and Nd concentrations. Our model provides a useful tool for the interpretation of εNd reconstructions. For example, we show that in an idealized North Atlantic freshwater hosing experiment, εNd changes in the Atlantic are documenting primarily the changes in water mass mixing and are hardly affected by the concomitant and large changes in the marine biological productivity and organic matter fluxes. However, the hosing experiment also shows that the end-member changes due to the change of ocean circulation can influence the interpretation of εNd in the Atlantic, depending on the location. The implementation of Nd, together with other existing tracers, such as δ18O, 231Pa/230Th, δ13C, and radiocarbon in the same model, can improve our understanding of past ocean circulation significantly.},
doi = {10.1029/2018MS001538},
journal = {Journal of Advances in Modeling Earth Systems},
number = ,
volume = ,
place = {United States},
year = {Mon Mar 04 00:00:00 EST 2019},
month = {Mon Mar 04 00:00:00 EST 2019}
}
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